Last week brought one of the most heart-warming stories of the year when the Make-A-Wish Foundation transformed San Francisco into Gotham City for five-year-old “Batkid,” Miles Scott. In an interview with Access Hollywood, former Batman Christian Bale had high praise for the event.

“I just think it’s great. It’s a great day for the little guy. I just think Make-A-Wish and San Francisco did such an amazing thing to organize that. You just think of the delight in that little fella’s heart, running around doing that. Then also as someone who has played Batman, it’s great to see that the symbol of Batman is so much bigger than any one person, than any film, than any comic book, any TV series, that’s really what it’s all about. It’s irrelevant which actor is playing it, we’re irrelevant in that sense. But for little Miles to have such a great day is just delightful.”

Ben Affleck, who will play Batman in the upcoming Batman vs. Superman film, tweeted about the event as well, saying: “Batkid. Best Batman ever. #SFBatKid #MakeAWish”

Speaking of Affleck, Bale was also asked in his interview what he thinks of Ben taking on the role.

“I wish him all the best. He’s a very experienced actor and filmmaker and he’ll make it his own. Our thing’s finished, we’ve always declared it was finished and it should be passed on to another actor and it will be again after him.”

His one piece of advice for Affleck? Have a bathroom escape plan…

“The only thing I said to him is just make sure he can take a piss without anyone having to help him. Because it’s a little bit humiliating, at least what I went through, when you have to have someone help you out of the costume. That was my main piece of advice for him.”